diff --git a/build.xml b/build.xml
index f8c0f95d6..4a99e2ebc 100644
--- a/build.xml
+++ b/build.xml
@@ -213,7 +213,7 @@
       <uptodate targetfile="${deploy.dir}/${lib.name}-abc.abc">
         <srcfiles dir="src/as" includes="**/*.as"/>
         <srcfiles dir="src/as/com/threerings/util/env" includes="Environment.as-tm"/>
-        <srcfiles dir="etc" includes="exclude-asc-files.txt"/>
+        <srcfiles dir="etc" includes="asc-files-*.txt"/>
         <srcfiles dir="lib" includes="*.abc"/>
       </uptodate>
     </or></condition>
@@ -221,22 +221,22 @@
 
   <!-- builds our thane library -->
   <target name="abclib" unless="no_build_abclib" depends="checkabclib">
-    <taskdef name="asc" classname="flex.ant.AscLibTask" classpathref="classpath"/>
+    <taskdef name="asc" classname="flex.ant.AscTask" classpathref="classpath"/>
     <copy overwrite="true" file="src/as/com/threerings/util/env/Environment.as-tm"
           tofile="src/as/com/threerings/util/env/Environment.as"/>
-    <dirname property="abs.deploy.dir" file="${deploy.dir}/somefile.txt"/>
-    <asc as3="true" strict="true" classpathref="classpath"
-            outdir="${abs.deploy.dir}" out="${lib.name}-abc">
+    <asc as3="true" strict="true" classpathref="classpath" use="AS3">
       <import dir="lib">
         <include name="builtin.abc"/>
         <include name="thane.abc"/>
       </import>
-      <filespec dir="src/as">
-        <include name="**/*.as"/>
-        <excludesfile name="etc/exclude-asc-files.txt"/>
-      </filespec>
+      <in dir="src/as"><includesfile name="etc/asc-files-00.txt"/></in>
+      <in dir="src/as"><includesfile name="etc/asc-files-01.txt"/></in>
+      <in dir="src/as"><includesfile name="etc/asc-files-02.txt"/></in>
+      <in dir="src/as"><includesfile name="etc/asc-files-03.txt"/></in>
+      <filespec dir="etc" includes="empty.as"/>
     </asc>
     <delete file="src/as/com/threerings/util/env/Environment.as"/>
+    <move overwrite="true" file="etc/empty.abc" tofile="${deploy.dir}/${lib.name}-abc.abc"/>
     <copy overwrite="true" file="lib/thane.abc" todir="${deploy.dir}"/>
     <copy overwrite="true" file="lib/builtin.abc" todir="${deploy.dir}"/>
   </target>
diff --git a/etc/asc-files-00.txt b/etc/asc-files-00.txt
new file mode 100644
index 000000000..2b17ea2f3
--- /dev/null
+++ b/etc/asc-files-00.txt
@@ -0,0 +1,3 @@
+com/threerings/util/env/Environment.as
+com/threerings/util/Log.as
+com/threerings/presents/dobj/DEvent.as
diff --git a/etc/asc-files-01.txt b/etc/asc-files-01.txt
new file mode 100644
index 000000000..9c2857b91
--- /dev/null
+++ b/etc/asc-files-01.txt
@@ -0,0 +1,3 @@
+com/threerings/presents/dobj/DObject.as
+com/threerings/crowd/chat/data/ChatMessage.as
+com/threerings/presents/dobj/NamedEvent.as
diff --git a/etc/asc-files-02.txt b/etc/asc-files-02.txt
new file mode 100644
index 000000000..51660ed84
--- /dev/null
+++ b/etc/asc-files-02.txt
@@ -0,0 +1,28 @@
+com/threerings/presents/client/Client.as
+com/threerings/presents/client/InvocationDecoder.as
+com/threerings/presents/client/BasicDirector.as
+com/threerings/presents/client/InvocationReceiver.as
+com/threerings/presents/client/InvocationService.as
+com/threerings/presents/data/InvocationCodes.as
+com/threerings/presents/net/Credentials.as
+com/threerings/presents/data/InvocationMarshaller.as
+com/threerings/presents/util/PresentsContext.as
+com/threerings/crowd/chat/client/CommandHandler.as
+com/threerings/presents/client/InvocationService_InvocationListener.as
+com/threerings/presents/client/InvocationAdapter.as
+com/threerings/presents/data/InvocationMarshaller_ListenerMarshaller.as
+com/threerings/crowd/chat/data/SystemMessage.as
+com/threerings/crowd/chat/data/UserMessage.as
+com/threerings/util/Controller.as
+com/threerings/presents/data/ClientObject.as
+com/threerings/io/SimpleStreamableObject.as
+com/threerings/io/Streamable.as
+com/threerings/io/Streamer.as
+com/threerings/presents/client/ClientAdapter.as
+com/threerings/presents/client/SessionObserver.as
+com/threerings/presents/dobj/ChangeListener.as
+com/threerings/presents/dobj/MessageEvent.as
+com/threerings/presents/net/UpstreamMessage.as
+com/threerings/presents/net/DownstreamMessage.as
+com/threerings/util/Equalable.as
+com/threerings/util/HashMap.as
diff --git a/etc/asc-files-03.txt b/etc/asc-files-03.txt
new file mode 100644
index 000000000..ea2b72905
--- /dev/null
+++ b/etc/asc-files-03.txt
@@ -0,0 +1,181 @@
+com/threerings/bureau/Log.as
+com/threerings/bureau/client/Agent.as
+com/threerings/bureau/client/BureauClient.as
+com/threerings/bureau/client/BureauDecoder.as
+com/threerings/bureau/client/BureauDirector.as
+com/threerings/bureau/client/BureauReceiver.as
+com/threerings/bureau/client/BureauService.as
+com/threerings/bureau/data/AgentObject.as
+com/threerings/bureau/data/BureauClientObject.as
+com/threerings/bureau/data/BureauCodes.as
+com/threerings/bureau/data/BureauCredentials.as
+com/threerings/bureau/data/BureauMarshaller.as
+com/threerings/bureau/util/BureauContext.as
+com/threerings/crowd/chat/client/BroadcastHandler.as
+com/threerings/crowd/chat/client/ChatDirector.as
+com/threerings/crowd/chat/client/ChatDisplay.as
+com/threerings/crowd/chat/client/ChatFilter.as
+com/threerings/crowd/chat/client/ChatService.as
+com/threerings/crowd/chat/client/ChatService_TellListener.as
+com/threerings/crowd/chat/client/ChatterObserver.as
+com/threerings/crowd/chat/client/ChatterValidator.as
+com/threerings/crowd/chat/client/ClearHandler.as
+com/threerings/crowd/chat/client/EmoteHandler.as
+com/threerings/crowd/chat/client/HelpHandler.as
+com/threerings/crowd/chat/client/SpeakHandler.as
+com/threerings/crowd/chat/client/SpeakService.as
+com/threerings/crowd/chat/client/TellAdapter.as
+com/threerings/crowd/chat/client/ThinkHandler.as
+com/threerings/crowd/chat/data/ChatCodes.as
+com/threerings/crowd/chat/data/ChatMarshaller.as
+com/threerings/crowd/chat/data/ChatMarshaller_TellMarshaller.as
+com/threerings/crowd/chat/data/SpeakMarshaller.as
+com/threerings/crowd/chat/data/TellFeedbackMessage.as
+com/threerings/crowd/chat/data/UserSystemMessage.as
+com/threerings/crowd/client/LocationDecoder.as
+com/threerings/crowd/client/LocationDirector.as
+com/threerings/crowd/client/LocationDirector_FailureHandler.as
+com/threerings/crowd/client/LocationObserver.as
+com/threerings/crowd/client/LocationReceiver.as
+com/threerings/crowd/client/LocationService.as
+com/threerings/crowd/client/LocationService_MoveListener.as
+com/threerings/crowd/client/MoveAdapter.as
+com/threerings/crowd/client/MoveFailedError.as
+com/threerings/crowd/client/MoveVetoedError.as
+com/threerings/crowd/client/OccupantDirector.as
+com/threerings/crowd/client/OccupantObserver.as
+com/threerings/crowd/client/PlaceController.as
+com/threerings/crowd/client/PlaceControllerDelegate.as
+com/threerings/crowd/client/PlaceView.as
+com/threerings/crowd/client/PlaceViewUtil.as
+com/threerings/crowd/data/BodyObject.as
+com/threerings/crowd/data/CrowdCodes.as
+com/threerings/crowd/data/LocationCodes.as
+com/threerings/crowd/data/LocationMarshaller.as
+com/threerings/crowd/data/LocationMarshaller_MoveMarshaller.as
+com/threerings/crowd/data/ManagerCaller.as
+com/threerings/crowd/data/OccupantInfo.as
+com/threerings/crowd/data/Place.as
+com/threerings/crowd/data/PlaceConfig.as
+com/threerings/crowd/data/PlaceObject.as
+com/threerings/crowd/data/TokenRing.as
+com/threerings/crowd/util/CrowdContext.as
+com/threerings/io/ArrayMask.as
+com/threerings/io/ClassMapping.as
+com/threerings/io/FrameAvailableEvent.as
+com/threerings/io/FrameReader.as
+com/threerings/io/ObjectInputStream.as
+com/threerings/io/ObjectOutputStream.as
+com/threerings/io/Translations.as
+com/threerings/io/TypedArray.as
+com/threerings/io/streamers/ArrayStreamer.as
+com/threerings/io/streamers/ByteArrayStreamer.as
+com/threerings/io/streamers/ByteStreamer.as
+com/threerings/io/streamers/FloatStreamer.as
+com/threerings/io/streamers/IntegerStreamer.as
+com/threerings/io/streamers/LongStreamer.as
+com/threerings/io/streamers/NumberStreamer.as
+com/threerings/io/streamers/ShortStreamer.as
+com/threerings/io/streamers/StringStreamer.as
+com/threerings/presents/client/ClientDObjectMgr.as
+com/threerings/presents/client/ClientEvent.as
+com/threerings/presents/client/ClientObserver.as
+com/threerings/presents/client/Communicator.as
+com/threerings/presents/client/ConfirmAdapter.as
+com/threerings/presents/client/InvocationDirector.as
+com/threerings/presents/client/InvocationReceiver_Registration.as
+com/threerings/presents/client/InvocationService_ConfirmListener.as
+com/threerings/presents/client/InvocationService_ResultListener.as
+com/threerings/presents/client/LogonError.as
+com/threerings/presents/client/ResultWrapper.as
+com/threerings/presents/client/ServerSwitcher.as
+com/threerings/presents/client/TimeBaseService.as
+com/threerings/presents/client/TimeBaseService_GotTimeBaseListener.as
+com/threerings/presents/data/AuthCodes.as
+com/threerings/presents/data/ConMgrStats.as
+com/threerings/presents/data/InvocationMarshaller_ConfirmMarshaller.as
+com/threerings/presents/data/InvocationMarshaller_ResultMarshaller.as
+com/threerings/presents/data/Permission.as
+com/threerings/presents/data/PermissionPolicy.as
+com/threerings/presents/data/TimeBaseMarshaller.as
+com/threerings/presents/data/TimeBaseMarshaller_GotTimeBaseMarshaller.as
+com/threerings/presents/dobj/AttributeChangeListener.as
+com/threerings/presents/dobj/AttributeChangedEvent.as
+com/threerings/presents/dobj/CompoundEvent.as
+com/threerings/presents/dobj/DObjectManager.as
+com/threerings/presents/dobj/DSet.as
+com/threerings/presents/dobj/DSet_Entry.as
+com/threerings/presents/dobj/DummyEntry.as
+com/threerings/presents/dobj/ElementUpdateListener.as
+com/threerings/presents/dobj/ElementUpdatedEvent.as
+com/threerings/presents/dobj/EntryAddedEvent.as
+com/threerings/presents/dobj/EntryRemovedEvent.as
+com/threerings/presents/dobj/EntryUpdatedEvent.as
+com/threerings/presents/dobj/EventListener.as
+com/threerings/presents/dobj/InvocationNotificationEvent.as
+com/threerings/presents/dobj/InvocationRequestEvent.as
+com/threerings/presents/dobj/InvocationResponseEvent.as
+com/threerings/presents/dobj/MessageAdapter.as
+com/threerings/presents/dobj/MessageListener.as
+com/threerings/presents/dobj/ObjectAccessError.as
+com/threerings/presents/dobj/ObjectAddedEvent.as
+com/threerings/presents/dobj/ObjectDeathListener.as
+com/threerings/presents/dobj/ObjectDestroyedEvent.as
+com/threerings/presents/dobj/ObjectRemovedEvent.as
+com/threerings/presents/dobj/OidList.as
+com/threerings/presents/dobj/OidListListener.as
+com/threerings/presents/dobj/ServerMessageEvent.as
+com/threerings/presents/dobj/SetAdapter.as
+com/threerings/presents/dobj/SetListener.as
+com/threerings/presents/dobj/Subscriber.as
+com/threerings/presents/dobj/SubscriberAdapter.as
+com/threerings/presents/net/AuthRequest.as
+com/threerings/presents/net/AuthResponse.as
+com/threerings/presents/net/AuthResponseData.as
+com/threerings/presents/net/BootstrapData.as
+com/threerings/presents/net/BootstrapNotification.as
+com/threerings/presents/net/EventNotification.as
+com/threerings/presents/net/FailureResponse.as
+com/threerings/presents/net/ForwardEventRequest.as
+com/threerings/presents/net/LogoffRequest.as
+com/threerings/presents/net/ObjectResponse.as
+com/threerings/presents/net/PingRequest.as
+com/threerings/presents/net/PongResponse.as
+com/threerings/presents/net/SubscribeRequest.as
+com/threerings/presents/net/UnsubscribeRequest.as
+com/threerings/presents/net/UnsubscribeResponse.as
+com/threerings/presents/net/UsernamePasswordCreds.as
+com/threerings/presents/util/SafeSubscriber.as
+com/threerings/util/ArrayIterator.as
+com/threerings/util/ArrayUtil.as
+com/threerings/util/Byte.as
+com/threerings/util/ClassUtil.as
+com/threerings/util/Cloneable.as
+com/threerings/util/CommandEvent.as
+com/threerings/util/Comparable.as
+com/threerings/util/Comparators.as
+com/threerings/util/Float.as
+com/threerings/util/Hashable.as
+com/threerings/util/Integer.as
+com/threerings/util/Iterator.as
+com/threerings/util/LogTarget.as
+com/threerings/util/Long.as
+com/threerings/util/Map.as
+com/threerings/util/MessageBundle.as
+com/threerings/util/MessageManager.as
+com/threerings/util/MethodQueue.as
+com/threerings/util/Name.as
+com/threerings/util/ObjectMarshaller.as
+com/threerings/util/ObserverList.as
+com/threerings/util/Random.as
+com/threerings/util/ResultAdapter.as
+com/threerings/util/ResultListener.as
+com/threerings/util/Short.as
+com/threerings/util/StreamableArrayList.as
+com/threerings/util/StreamableHashMap.as
+com/threerings/util/StringBuilder.as
+com/threerings/util/StringUtil.as
+com/threerings/util/TimeUtil.as
+com/threerings/util/Util.as
+com/threerings/util/Wrapped.as
+com/threerings/util/langBoolean.as
diff --git a/etc/asc-files.txt b/etc/asc-files.txt
new file mode 100644
index 000000000..e393de64d
--- /dev/null
+++ b/etc/asc-files.txt
@@ -0,0 +1,214 @@
+com/threerings/bureau/Log.as
+com/threerings/bureau/client/Agent.as
+com/threerings/bureau/client/BureauClient.as
+com/threerings/bureau/client/BureauDecoder.as
+com/threerings/bureau/client/BureauDirector.as
+com/threerings/bureau/client/BureauReceiver.as
+com/threerings/bureau/client/BureauService.as
+com/threerings/bureau/data/AgentObject.as
+com/threerings/bureau/data/BureauClientObject.as
+com/threerings/bureau/data/BureauCodes.as
+com/threerings/bureau/data/BureauCredentials.as
+com/threerings/bureau/data/BureauMarshaller.as
+com/threerings/bureau/util/BureauContext.as
+com/threerings/crowd/chat/client/BroadcastHandler.as
+com/threerings/crowd/chat/client/ChatDirector.as
+com/threerings/crowd/chat/client/ChatDisplay.as
+com/threerings/crowd/chat/client/ChatFilter.as
+com/threerings/crowd/chat/client/ChatService.as
+com/threerings/crowd/chat/client/ChatService_TellListener.as
+com/threerings/crowd/chat/client/ChatterObserver.as
+com/threerings/crowd/chat/client/ChatterValidator.as
+com/threerings/crowd/chat/client/ClearHandler.as
+com/threerings/crowd/chat/client/CommandHandler.as
+com/threerings/crowd/chat/client/EmoteHandler.as
+com/threerings/crowd/chat/client/HelpHandler.as
+com/threerings/crowd/chat/client/SpeakHandler.as
+com/threerings/crowd/chat/client/SpeakService.as
+com/threerings/crowd/chat/client/TellAdapter.as
+com/threerings/crowd/chat/client/ThinkHandler.as
+com/threerings/crowd/chat/data/ChatCodes.as
+com/threerings/crowd/chat/data/ChatMarshaller.as
+com/threerings/crowd/chat/data/ChatMarshaller_TellMarshaller.as
+com/threerings/crowd/chat/data/ChatMessage.as
+com/threerings/crowd/chat/data/SpeakMarshaller.as
+com/threerings/crowd/chat/data/SystemMessage.as
+com/threerings/crowd/chat/data/TellFeedbackMessage.as
+com/threerings/crowd/chat/data/UserMessage.as
+com/threerings/crowd/chat/data/UserSystemMessage.as
+com/threerings/crowd/client/LocationDecoder.as
+com/threerings/crowd/client/LocationDirector.as
+com/threerings/crowd/client/LocationDirector_FailureHandler.as
+com/threerings/crowd/client/LocationObserver.as
+com/threerings/crowd/client/LocationReceiver.as
+com/threerings/crowd/client/LocationService.as
+com/threerings/crowd/client/LocationService_MoveListener.as
+com/threerings/crowd/client/MoveAdapter.as
+com/threerings/crowd/client/MoveFailedError.as
+com/threerings/crowd/client/MoveVetoedError.as
+com/threerings/crowd/client/OccupantDirector.as
+com/threerings/crowd/client/OccupantObserver.as
+com/threerings/crowd/client/PlaceController.as
+com/threerings/crowd/client/PlaceControllerDelegate.as
+com/threerings/crowd/client/PlaceView.as
+com/threerings/crowd/client/PlaceViewUtil.as
+com/threerings/crowd/data/BodyObject.as
+com/threerings/crowd/data/CrowdCodes.as
+com/threerings/crowd/data/LocationCodes.as
+com/threerings/crowd/data/LocationMarshaller.as
+com/threerings/crowd/data/LocationMarshaller_MoveMarshaller.as
+com/threerings/crowd/data/ManagerCaller.as
+com/threerings/crowd/data/OccupantInfo.as
+com/threerings/crowd/data/Place.as
+com/threerings/crowd/data/PlaceConfig.as
+com/threerings/crowd/data/PlaceObject.as
+com/threerings/crowd/data/TokenRing.as
+com/threerings/crowd/util/CrowdContext.as
+com/threerings/io/ArrayMask.as
+com/threerings/io/ClassMapping.as
+com/threerings/io/FrameAvailableEvent.as
+com/threerings/io/FrameReader.as
+com/threerings/io/ObjectInputStream.as
+com/threerings/io/ObjectOutputStream.as
+com/threerings/io/SimpleStreamableObject.as
+com/threerings/io/Streamable.as
+com/threerings/io/Streamer.as
+com/threerings/io/Translations.as
+com/threerings/io/TypedArray.as
+com/threerings/io/streamers/ArrayStreamer.as
+com/threerings/io/streamers/ByteArrayStreamer.as
+com/threerings/io/streamers/ByteStreamer.as
+com/threerings/io/streamers/FloatStreamer.as
+com/threerings/io/streamers/IntegerStreamer.as
+com/threerings/io/streamers/LongStreamer.as
+com/threerings/io/streamers/NumberStreamer.as
+com/threerings/io/streamers/ShortStreamer.as
+com/threerings/io/streamers/StringStreamer.as
+com/threerings/presents/client/BasicDirector.as
+com/threerings/presents/client/Client.as
+com/threerings/presents/client/ClientAdapter.as
+com/threerings/presents/client/ClientDObjectMgr.as
+com/threerings/presents/client/ClientEvent.as
+com/threerings/presents/client/ClientObserver.as
+com/threerings/presents/client/Communicator.as
+com/threerings/presents/client/ConfirmAdapter.as
+com/threerings/presents/client/InvocationAdapter.as
+com/threerings/presents/client/InvocationDecoder.as
+com/threerings/presents/client/InvocationDirector.as
+com/threerings/presents/client/InvocationReceiver.as
+com/threerings/presents/client/InvocationReceiver_Registration.as
+com/threerings/presents/client/InvocationService.as
+com/threerings/presents/client/InvocationService_ConfirmListener.as
+com/threerings/presents/client/InvocationService_InvocationListener.as
+com/threerings/presents/client/InvocationService_ResultListener.as
+com/threerings/presents/client/LogonError.as
+com/threerings/presents/client/ResultWrapper.as
+com/threerings/presents/client/ServerSwitcher.as
+com/threerings/presents/client/SessionObserver.as
+com/threerings/presents/client/TimeBaseService.as
+com/threerings/presents/client/TimeBaseService_GotTimeBaseListener.as
+com/threerings/presents/data/AuthCodes.as
+com/threerings/presents/data/ClientObject.as
+com/threerings/presents/data/ConMgrStats.as
+com/threerings/presents/data/InvocationCodes.as
+com/threerings/presents/data/InvocationMarshaller.as
+com/threerings/presents/data/InvocationMarshaller_ConfirmMarshaller.as
+com/threerings/presents/data/InvocationMarshaller_ListenerMarshaller.as
+com/threerings/presents/data/InvocationMarshaller_ResultMarshaller.as
+com/threerings/presents/data/Permission.as
+com/threerings/presents/data/PermissionPolicy.as
+com/threerings/presents/data/TimeBaseMarshaller.as
+com/threerings/presents/data/TimeBaseMarshaller_GotTimeBaseMarshaller.as
+com/threerings/presents/dobj/AttributeChangeListener.as
+com/threerings/presents/dobj/AttributeChangedEvent.as
+com/threerings/presents/dobj/ChangeListener.as
+com/threerings/presents/dobj/CompoundEvent.as
+com/threerings/presents/dobj/DEvent.as
+com/threerings/presents/dobj/DObject.as
+com/threerings/presents/dobj/DObjectManager.as
+com/threerings/presents/dobj/DSet.as
+com/threerings/presents/dobj/DSet_Entry.as
+com/threerings/presents/dobj/DummyEntry.as
+com/threerings/presents/dobj/ElementUpdateListener.as
+com/threerings/presents/dobj/ElementUpdatedEvent.as
+com/threerings/presents/dobj/EntryAddedEvent.as
+com/threerings/presents/dobj/EntryRemovedEvent.as
+com/threerings/presents/dobj/EntryUpdatedEvent.as
+com/threerings/presents/dobj/EventListener.as
+com/threerings/presents/dobj/InvocationNotificationEvent.as
+com/threerings/presents/dobj/InvocationRequestEvent.as
+com/threerings/presents/dobj/InvocationResponseEvent.as
+com/threerings/presents/dobj/MessageAdapter.as
+com/threerings/presents/dobj/MessageEvent.as
+com/threerings/presents/dobj/MessageListener.as
+com/threerings/presents/dobj/NamedEvent.as
+com/threerings/presents/dobj/ObjectAccessError.as
+com/threerings/presents/dobj/ObjectAddedEvent.as
+com/threerings/presents/dobj/ObjectDeathListener.as
+com/threerings/presents/dobj/ObjectDestroyedEvent.as
+com/threerings/presents/dobj/ObjectRemovedEvent.as
+com/threerings/presents/dobj/OidList.as
+com/threerings/presents/dobj/OidListListener.as
+com/threerings/presents/dobj/ServerMessageEvent.as
+com/threerings/presents/dobj/SetAdapter.as
+com/threerings/presents/dobj/SetListener.as
+com/threerings/presents/dobj/Subscriber.as
+com/threerings/presents/dobj/SubscriberAdapter.as
+com/threerings/presents/net/AuthRequest.as
+com/threerings/presents/net/AuthResponse.as
+com/threerings/presents/net/AuthResponseData.as
+com/threerings/presents/net/BootstrapData.as
+com/threerings/presents/net/BootstrapNotification.as
+com/threerings/presents/net/Credentials.as
+com/threerings/presents/net/DownstreamMessage.as
+com/threerings/presents/net/EventNotification.as
+com/threerings/presents/net/FailureResponse.as
+com/threerings/presents/net/ForwardEventRequest.as
+com/threerings/presents/net/LogoffRequest.as
+com/threerings/presents/net/ObjectResponse.as
+com/threerings/presents/net/PingRequest.as
+com/threerings/presents/net/PongResponse.as
+com/threerings/presents/net/SubscribeRequest.as
+com/threerings/presents/net/UnsubscribeRequest.as
+com/threerings/presents/net/UnsubscribeResponse.as
+com/threerings/presents/net/UpstreamMessage.as
+com/threerings/presents/net/UsernamePasswordCreds.as
+com/threerings/presents/util/PresentsContext.as
+com/threerings/presents/util/SafeSubscriber.as
+com/threerings/util/ArrayIterator.as
+com/threerings/util/ArrayUtil.as
+com/threerings/util/Byte.as
+com/threerings/util/ClassUtil.as
+com/threerings/util/Cloneable.as
+com/threerings/util/CommandEvent.as
+com/threerings/util/Comparable.as
+com/threerings/util/Comparators.as
+com/threerings/util/Controller.as
+com/threerings/util/Equalable.as
+com/threerings/util/Float.as
+com/threerings/util/HashMap.as
+com/threerings/util/Hashable.as
+com/threerings/util/Integer.as
+com/threerings/util/Iterator.as
+com/threerings/util/Log.as
+com/threerings/util/LogTarget.as
+com/threerings/util/Long.as
+com/threerings/util/Map.as
+com/threerings/util/MessageBundle.as
+com/threerings/util/MessageManager.as
+com/threerings/util/MethodQueue.as
+com/threerings/util/Name.as
+com/threerings/util/ObjectMarshaller.as
+com/threerings/util/ObserverList.as
+com/threerings/util/Random.as
+com/threerings/util/ResultAdapter.as
+com/threerings/util/ResultListener.as
+com/threerings/util/Short.as
+com/threerings/util/StreamableArrayList.as
+com/threerings/util/StreamableHashMap.as
+com/threerings/util/StringBuilder.as
+com/threerings/util/StringUtil.as
+com/threerings/util/TimeUtil.as
+com/threerings/util/Util.as
+com/threerings/util/Wrapped.as
+com/threerings/util/langBoolean.as
diff --git a/etc/empty.as b/etc/empty.as
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/build.xml b/tests/build.xml
index 792a72776..b05ea9182 100644
--- a/tests/build.xml
+++ b/tests/build.xml
@@ -113,20 +113,20 @@
   <!-- builds our Flash (abc) library -->
   <target name="abclib" unless="abclib_up_to_date" depends="check-abclib,prepare"
     description="Build the abc library for tests classes">
-    <taskdef name="asc" classname="flex.ant.AscLibTask" classpathref="classpath"/>
-    <dirname property="abs.deploy.dir" file="${deploy.dir}/somefile.txt"/>
-    <asc as3="true" strict="true" classpathref="classpath"
-            outdir="${abs.deploy.dir}" out="testslib">
+    <taskdef name="asc" classname="flex.ant.AscTask" classpathref="classpath"/>
+    <asc as3="true" strict="true" classpathref="classpath" use="AS3">
       <import dir="../dist">
         <include name="builtin.abc"/>
         <include name="thane.abc"/>
         <include name="narya-abc.abc"/>
       </import>
-      <filespec dir="src/as">
+      <in dir="src/as">
         <include name="**/*.as"/>
         <exclude name="**/*Main.as"/>
-      </filespec>
+      </in>
+      <filespec dir="../etc" includes="empty.as"/>
     </asc>
+    <move overwrite="true" file="../etc/empty.abc" tofile="${deploy.dir}/testslib.abc"/>
   </target>
 
   <!-- test the component metadata bundling process -->
@@ -223,18 +223,16 @@
   <target name="bureau-compile-thane-client" 
     unless="thane_client_up_to_date" depends="abclib,bureau-check-thane-client"
 	description="Compiles the thane client for testing the bureau library">
-    <taskdef name="ascx" classname="flex.ant.AscTask" classpathref="classpath"/>
-    <ascx as3="true" strict="true" classpathref="classpath">
+    <taskdef name="asc" classname="flex.ant.AscTask" classpathref="classpath"/>
+    <asc as3="true" strict="true" classpathref="classpath" use="AS3">
       <import dir="..">
         <include name="dist/builtin.abc"/>
         <include name="dist/thane.abc"/>
         <include name="dist/narya-abc.abc"/>
         <include name="tests/dist/testslib.abc"/>
       </import>
-      <filespec dir="src/as">
-        <include name="com/threerings/bureau/client/TestClientMain.as"/>
-      </filespec>
-    </ascx>
+      <filespec dir="src/as" includes="com/threerings/bureau/client/TestClientMain.as"/>
+    </asc>
     <move overwrite="true" file="src/as/com/threerings/bureau/client/TestClientMain.abc" todir="dist"/>
   </target>